exchange_info = 'db/binance_exchange_info.h5'
kline_support = 'db/kline_support.h5'
kline_support_copy = 'db/kline_support_tmp.h5'
message_data = 'db/message_data.h5'
message_data_copy = 'db/message_data_tmp.h5'
user_data = 'db/user_data.h5'
user_data_copy = 'db/user_data_copy.h5'